Using the cigarette data in Exercise 6.5-7, find 95% confidence intervals for , , and 2 under the usual assumptions. In Exercise 6.5-7 Brand Capri

Using the cigarette data in Exercise 6.5-7, find 95% confidence intervals for α, β, and σ2 under the usual assumptions.
In Exercise 6.5-7

Brand Capri Carlton Kent Kool Milds Marlboro Lights 10 12 Vantage Merit Ultras r y Brand 9 6 Now 4 6 Salem 14 14 Triumph 12 12 True 17 18 5 7 Virginia Slims 15 13